Bank of New Hampshire, Plymouth Branch Basic Info Reviews Routing Numbers Map & Direction Name: Bank of New Hampshire, Plymouth Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 6 Riverside Drive Plymouth, New Hampshire 03264 Grafton County View other branches Phone: 603-536-4200 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer011701903YN211770271YY From: To: